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Finding the Fourth Proportional to 642,522.66, 886,686.48 and 356,047.53

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Solution

The fourth proportional to 642,522.66, 886,686.48 and 356,047.53 is: 491,348.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,522.66 : 886,686.48 = 356,047.53 : x
  2. Step 2: Convert to fraction form
    642,522.66/886,686.48 = 356,047.53/x
  3. Step 3: Cross multiply
    642,522.66x = 886,686.48 × 356,047.53
  4. Step 4: Simplify right side
    642,522.66x = 315,702,531,088.39
  5. Step 5: Solve for x
    x = 315,702,531,088.39/642,522.66
  6. Step 6: Final answer
    x = 491,348.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.